Affleck - who is named on the campaign's website as a wanted 'culturemaker' to help support the initiative - wrote a statement on his humanitarian website denouncing Kony's actions.

"Joseph Kony has been one of the most infamous and most wanted men in Africa for decades," the actor wrote. "His vicious cruelty has caused untold pain over the last 20 years. Because of Invisible Children, a hundred million more people in North America now know his story.

"Joseph Kony must be caught. His lieutenants must be brought to justice and the LRA abductees still in the bush - fighting against their will - must be rescued and rehabilitated."